Fix multitouch bug on flyout drag: don't reset flyout drag mode before clearing touch identifier.
Fix multitouch bug on flyout drag: don't reset flyout drag mode before clearing touch identifier.

gengshenghong/scratch-blocks,gengshenghong/scratch-blocks,sclements/scratch-blocks,griffpatch/scratch-blocks,sclements/scratch-blocks,LLK/scratch-blocks,LLK/scratch-blocks,gengshenghong/scratch-blocks,gengshenghong/scratch-blocks,LLK/scratch-blocks,LLK/scratch-blocks,griffpatch/scratch-blocks,griffpatch/scratch-blocks,sclements/scratch-blocks,sclements/scratch-blocks,griffpatch/scratch-blocks,LLK/scratch-blocks,sclements/scratch-blocks,gengshenghong/scratch-blocks,griffpatch/scratch-blocks